ヒステリシス付きスイッチの作り方(python)

flag = 0

if    a > 0.5                     : flag = 1
elif flag==1 and a > -0.5 : flag = 1
else                                : flag = 0

import numpy as np
import matplotlib.pyplot as plt
import math

flag = 0
sin_value = []
flag_value = []

for n in np.arange(0,7,0.01):
    a = math.sin(n)

    if    a > 0.5                     : flag = 1
    elif flag==1 and a > -0.5 : flag = 1
    else                                : flag = 0

    sin_value.append(a) #グラフ描画用データ格納
    flag_value.append(flag) #グラフ描画データ格納

#グラフ描画
fig = plt.figure()

plt.subplot(2,1,1)
plt.plot(np.arange(0,7,0.01) , sin_value)

plt.subplot(2,1,2)
plt.plot(np.arange(0,7,0.01) , flag_value)

plt.show()